On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 18 on 2012-03-28
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-28
Not in Firefox
Not in Firefox for Android
In Internet Explorer version 8 on 2009-03-19
In Quest Browser version 5.0 on undefined
In Opera version 9.2 on 2007-04-11
In Opera Android version 10.1 on 2010-11-09
In Safari version 6 on 2012-07-25
In Safari on iOS version 6 on 2012-09-10
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09